Filter Element

Abstract

A filter element for filtering impurities from air, comprises one or more filter packages whereby each filter package is made of a single-layered or multilayered filter medium and is connected to an inflow opening in an inlet piece. The inlet piece and the inflow opening of the inlet piece have an aerodynamic design, and that the filter package is essentially skittle-shaped, such that one end of which is open and fastened to the inflow opening and the other end of which is closed by a filter medium from which the filter package is also made.

1 - 12 . (canceled) 
     
     
         13 . A filter element for filtering impurities from air, whereby the filter element comprises one or more filter packages whereby each filter package is made of a single-layered or multilayered filter medium and is connected to an inflow opening in an inlet piece, wherein the inlet piece and the inflow opening of the inlet piece have an aerodynamic design, and that the filter package is essentially skittle-shaped, one end of which is open and fastened to the inflow opening and the other end of which is closed by a filter medium from which the filter package is also made. 
     
     
         14 . The filter element according to  claim 13 , wherein the inflow opening of the inlet piece has a circular, polygonal or oval cross-section, whereby the cross-sections of the filter package parallel to the inflow opening are also circular, polygonal or oval. 
     
     
         15 . The filter element according to  claim 13 , wherein the diameter of the filter package changes in the longitudinal direction of the filter package, whereby the diameter remains constant or approximately constant over a certain distance of the length of the filter package from the inflow opening, after which the diameter then gradually decreases over a certain distance, after which the diameter again gradually increases and whereby the closed end is flat. 
     
     
         16 . The filter element according to  claim 13 , wherein the one or more filter packages are closed at the other end by a filter package and thus also filters the air and creates a better flow, and thus a lower pressure drop across the filter element. 
     
     
         17 . The filter element according to  claim 13 , wherein the filter element comprises a number of filter packages that are connected together by their inlet piece. 
     
     
         18 . The filter element according to  claim 13 , wherein the filter element comprises a number of filter packages that are affixed in a frame by their inlet piece. 
     
     
         19 . The filter element according to  claim 13 , wherein the inlet pieces, and if applicable the frame, form a single unit. 
     
     
         20 . The filter element according to  claim 13 , wherein each filter package can be separately detached from the inlet piece and can be replaced. 
     
     
         21 . The filter element according to  claim 13 , wherein the inlet piece and the one or more filter packages form an inextricable unit. 
     
     
         22 . The filter element according to  claim 13 , wherein the filter medium from which the filter package is made at least comprises one of the following materials: paper, glass fibre paper, plastic, metal gauze, woven fabric, non-woven fabric or another perforated material. 
     
     
         23 . The filter element according to  claim 13 , wherein the filter package is made of a material that is rigid. 
     
     
         24 . The filter combination, wherein the filter combination consists of two or more filter elements according to  claim 13 , of which the filter packages of the filter elements are inserted into one another to form a compact filter combination.